… to which the 2722 is connected (in this example we're using Address #2) and enter the string as shown into the VISA Resource control.
Note: For each VI setting, you can either look at the Front Panel view…
… to the correct locations and versions.
Now double click on APxControl.py. The UI will open, as shown above. Click the first button to load APx500. Then, click the second to load the example project. Click…
… the Configuration in the Output Settings dialog of Signal Path Setup to one of the CMRR modes, as shown below.
Configuration in the Output Setting dialog. If the instrument is not in the APx525 Family,…
… which is discussed in Technote 106: Measuring Power Supply Rejection Ratio (PSRR).
The graph below shows PSRR versus frequency for a class D amplifier used in mobile devices, with appended traces for…
… set to a sample rate of 48 kHz.
Fig 2. Sine D/A generator, FFT with Equiripple window.
Figure 2 shows an FFT measured with an Equiripple window, using the Sine D/A generator set to a frequency of 1…
… Basic.NET
In VB.NET, the references are accessed by selecting Project > Properties, as shown in Figure 1 (Note: The images shown below are from Microsoft Visual Basic 2008 Express Edition. The…
… recordings, the generator was set to generate a 1 kHz sine wave at -20.0 dBV (100 mVrms). Figure 1 shows the RMS Level results from analyzing these five .wav files with the Input Connector set to File (Analog…
… impedance curve is level dependent.
Figure 1. Schematic of loudspeaker impedance test.
Figure 1 shows a basic schematic of the Constant Voltage method, while Figure 2 shows the actual connections. Two…
… and adjacent bins, to determine its precise frequency. When finished, an FFT response graph will be shown, and the prompt will reappear with the frequency error displayed. Since the nominal sample rate of the…
… observe, for example, a walking zeros pattern, set the Digital Generator and Digital I/O panels as shown below. With an output sample rate of 48 kHz and the Samples/Step control set to 48 k, the zeros will…
